:root{
  --paper:#f7f4ed;
  --paper-2:#ede6d8;
  --ink:#101114;
  --ink-2:#33353a;
  --muted:#5e615f;
  --line:#d7d1c3;
  --line-2:#c8c1b2;
  --accent:#b51627;
  --accent-2:#0f5b57;
  --accent-3:#2d4d86;
  --shadow:0 18px 48px rgba(16,17,20,.08);
  --shadow-soft:0 10px 24px rgba(16,17,20,.06);
  --radius:8px;
  --max:1320px;
  color-scheme: light;
  scroll-behavior: smooth;
}

*{box-sizing:border-box}

html,body{
  margin:0;
  min-width:320px;
  min-height:100%;
}

body{
  color:var(--ink);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",system-ui,sans-serif;
  line-height:1.74;
  background:
    linear-gradient(180deg, #fffdf8 0%, var(--paper) 100%);
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  background:
    linear-gradient(90deg, rgba(16,17,20,.03) 1px, transparent 1px) 0 0 / 76px 100%,
    linear-gradient(rgba(16,17,20,.028) 1px, transparent 1px) 0 0 / 100% 84px;
  opacity:.5;
  mask-image: linear-gradient(180deg, rgba(0,0,0,.14), transparent 86%);
}

a{
  color:inherit;
  text-decoration:none;
}

p,ul,ol,dl,figure{margin:0}

img{max-width:100%;display:block}

.skip-link{
  position:absolute;
  left:-999px;
  top:10px;
  z-index:100;
  padding:10px 14px;
  border:1px solid var(--line);
  border-radius:999px;
  background:#fff;
  color:var(--ink);
  box-shadow:var(--shadow-soft);
}

.skip-link:focus{
  left:12px;
}

.page{
  width:min(var(--max), calc(100vw - 24px));
  margin:0 auto;
  padding:14px 0 36px;
  position:relative;
  z-index:1;
}

.masthead{
  display:grid;
  grid-template-columns:auto 1fr;
  align-items:end;
  gap:20px;
  padding:10px 0 16px;
  border-bottom:3px solid var(--ink);
}

.brand{
  display:flex;
  align-items:center;
  gap:14px;
  min-width:0;
}

.brand-mark{
  width:52px;
  height:52px;
  display:grid;
  place-items:center;
  flex:0 0 auto;
  color:#fff;
  background:var(--ink);
  font:700 17px/1 "Songti SC","Noto Serif SC",serif;
  letter-spacing:.04em;
}

.brand-copy strong{
  display:block;
  font-size:17px;
  line-height:1.12;
  letter-spacing:.02em;
}

.brand-copy span{
  display:block;
  margin-top:3px;
  color:var(--muted);
  font-size:12px;
  letter-spacing:.08em;
  text-transform:uppercase;
}

.topnav{
  display:flex;
  flex-wrap:wrap;
  justify-content:flex-end;
  gap:0;
  margin-left:auto;
  padding-bottom:3px;
  font-size:13px;
  color:var(--muted);
}

.topnav a{
  padding:6px 10px;
  border-bottom:1px solid transparent;
}

.topnav a + a{
  position:relative;
}

.topnav a + a::before{
  content:"/";
  margin-right:10px;
  color:var(--line-2);
}

.topnav a:hover,
.topnav a:focus-visible{
  color:var(--ink);
  border-bottom-color:var(--accent);
  outline:none;
}

.main{
  display:grid;
  gap:18px;
  margin-top:18px;
}

.lead-slab,
.section,
.about-intro,
.about-grid,
.footer{
  background:rgba(255,255,255,.82);
  border:1px solid var(--line);
  box-shadow:var(--shadow);
}

.lead-slab{
  display:grid;
  grid-template-columns:minmax(0,1.2fr) minmax(300px,.8fr);
  gap:20px;
  padding:26px;
}

.lead-copy{
  padding-right:6px;
}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  width:fit-content;
  color:var(--accent);
  font-size:12px;
  letter-spacing:.2em;
  text-transform:uppercase;
}

.eyebrow::before{
  content:"";
  width:22px;
  height:2px;
  background:var(--accent);
}

h1{
  margin:14px 0 0;
  max-width:11ch;
  font-family:"Songti SC","Noto Serif SC",serif;
  font-size:clamp(42px,6.2vw,82px);
  line-height:.94;
  letter-spacing:-.05em;
}

h2{
  margin:0;
  font-family:"Songti SC","Noto Serif SC",serif;
  font-size:clamp(24px,2.1vw,34px);
  line-height:1.1;
  letter-spacing:-.03em;
}

h3{
  margin:0;
  font-size:18px;
  line-height:1.2;
}

.lede{
  margin-top:16px;
  max-width:66ch;
  font-size:18px;
  color:var(--ink-2);
}

.lede strong{
  color:var(--ink);
}

.summary-tags{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:18px;
}

.summary-tags span{
  display:inline-flex;
  align-items:center;
  min-height:34px;
  padding:0 12px;
  border:1px solid var(--line-2);
  background:#fff;
  color:var(--ink);
  font-size:13px;
}

.lead-rail{
  display:grid;
  gap:10px;
  align-content:start;
}

.rail-card{
  padding:16px 16px 15px;
  border-top:2px solid var(--ink);
  border-bottom:1px solid var(--line);
  background:linear-gradient(180deg, rgba(255,255,255,.94), rgba(250,247,240,.96));
}

.rail-card h2{
  font-size:19px;
}

.rail-card p{
  margin-top:10px;
  color:var(--muted);
  font-size:14px;
}

.section{
  padding:24px 26px;
}

.section-head{
  display:grid;
  gap:10px;
  margin-bottom:18px;
}

.section-head p{
  color:var(--muted);
  max-width:74ch;
}

.section-grid .directory{
  display:grid;
  grid-template-columns:repeat(2, minmax(0, 1fr));
  gap:14px;
}

.directory-item{
  display:grid;
  grid-template-columns:72px minmax(0,1fr);
  gap:14px;
  align-items:start;
  padding:16px;
  border-top:2px solid var(--ink);
  border-bottom:1px solid var(--line-2);
  background:linear-gradient(180deg, rgba(255,255,255,.96), rgba(248,244,235,.95));
}

.directory-label{
  width:72px;
  min-height:72px;
  display:grid;
  place-items:center;
  font:700 20px/1 "Songti SC","Noto Serif SC",serif;
  color:var(--accent);
  background:#fff;
  border:1px solid var(--line);
}

.directory-copy p,
.steps p,
.about-card p,
.notice-box p{
  margin-top:8px;
  color:var(--ink-2);
  font-size:14px;
}

.section-split{
  display:grid;
  grid-template-columns:minmax(0,1fr);
}

.steps{
  display:grid;
  grid-template-columns:repeat(3, minmax(0, 1fr));
  gap:14px;
  list-style:none;
  padding:0;
  counter-reset:step;
}

.steps li{
  position:relative;
  padding:18px 18px 18px 18px;
  border-top:2px solid var(--ink);
  border-bottom:1px solid var(--line-2);
  background:linear-gradient(180deg, rgba(255,255,255,.96), rgba(247,243,235,.95));
}

.steps li::before{
  counter-increment:step;
  content:"0" counter(step);
  display:block;
  margin-bottom:12px;
  color:var(--accent);
  font:700 14px/1 "Songti SC","Noto Serif SC",serif;
}

.steps strong{
  display:block;
  font-size:16px;
}

.section-notice{
  display:grid;
  grid-template-columns:repeat(2, minmax(0, 1fr));
  gap:14px;
  background:transparent;
  border:none;
  box-shadow:none;
  padding:0;
}

.notice-box{
  padding:20px 22px;
  border-top:2px solid var(--ink);
  border-bottom:1px solid var(--line-2);
  background:linear-gradient(180deg, rgba(255,255,255,.96), rgba(248,244,235,.95));
  box-shadow:var(--shadow-soft);
}

.notice-box h2{
  font-size:22px;
}

.footer{
  display:flex;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
  align-items:center;
  padding:14px 18px;
  margin-top:18px;
  border-top:3px solid var(--ink);
  background:rgba(255,255,255,.85);
}

.footer p{
  color:var(--muted);
  font-size:13px;
}

.footer-links{
  display:flex;
  flex-wrap:wrap;
  gap:8px 14px;
}

.footer-links a{
  color:var(--accent-2);
  border-bottom:1px solid transparent;
}

.footer-links a:hover,
.footer-links a:focus-visible{
  border-bottom-color:var(--accent-2);
  outline:none;
}

.main-about{
  display:grid;
  gap:18px;
}

.about-intro{
  padding:26px;
  display:grid;
  gap:10px;
}

.about-intro .lede{
  margin-top:4px;
}

.about-grid{
  display:grid;
  grid-template-columns:repeat(2, minmax(0, 1fr));
  gap:14px;
  padding:18px;
}

.about-card{
  padding:18px;
  border-top:2px solid var(--ink);
  border-bottom:1px solid var(--line-2);
  background:linear-gradient(180deg, rgba(255,255,255,.96), rgba(247,243,235,.95));
}

.footer-about{
  margin-top:0;
}

@media (max-width: 1080px){
  .lead-slab{
    grid-template-columns:1fr;
  }

  .section-grid .directory,
  .about-grid{
    grid-template-columns:1fr;
  }

  .steps{
    grid-template-columns:1fr;
  }
}

@media (max-width: 760px){
  .page{
    width:min(var(--max), calc(100vw - 16px));
    padding:8px 0 24px;
  }

  .masthead{
    grid-template-columns:1fr;
    gap:12px;
    align-items:start;
  }

  .topnav{
    justify-content:flex-start;
    line-height:1.5;
  }

  .topnav a{
    padding-left:0;
  }

  .topnav a + a::before{
    margin-right:8px;
  }

  .lead-slab,
  .section,
  .about-intro,
  .about-grid{
    padding:18px;
  }

  h1{
    max-width:12ch;
    font-size:clamp(36px,12vw,54px);
  }

  .lede{
    font-size:16px;
  }

  .directory-item{
    grid-template-columns:1fr;
  }

  .directory-label{
    width:54px;
    min-height:54px;
    font-size:17px;
  }

  .footer{
    padding:14px 16px;
  }
}